An exceptional and highly desirable find for the advanced early sound recording enthusiast, this lot features a U.S. Everlasting 4-Minute celluloid cylinder record, manufactured by the U.S. Phonograph Co. of Cleveland, Ohio. This specific cylinder features distinct, hand-carved experimental markings reading "U.S. EXP. T-108" and "Mc-1" along its top rim, alongside a faint stamped "Exp. No 1" on the smooth title band, strongly indicating a factory test molding or an unreleased developmental copy. The record comes accompanied by its original cardboard storage container boasting the iconic "Greatest in Volume" graphic. Both the black celluloid cylinder and its cardboard container are in good, stable condition, exhibiting light surface scratches across the grooves from handling, with minor edge wear, fading, and scuffing to the container's exterior paper label. H 4.25", W 2.25", D 2.25". Please see photos for condition. From the Allen Koenigsberg collection.